Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
Mattress catamaran
For weekend hiking enthusiasts who prefer relaxing on the water, an unusual lightweight catamaran design published in the Hungarian magazine "Ezermester" will certainly be of interest....
OFF-SEASON ATV
Our magazine was one of the main popularizers of the recently introduced family of ATVs — vehicles for low pressure tires. All season, excellent permeability, the ability not to disturb...